343440018 has 48 divisors (see below), whose sum is σ = 797921280. Its totient is φ = 106374528.

The previous prime is 343440017. The next prime is 343440023. The reversal of 343440018 is 810044343.

It is a junction number, because it is equal to n+sod(n) for n = 343439973 and 343440000.

It is not an unprimeable number, because it can be changed into a prime (343440017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17071 + ... + 31277.

It is an arithmetic number, because the mean of its divisors is an integer number (16623360).

Almost surely, 2^343440018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 343440018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398960640).

343440018 is an abundant number, since it is smaller than the sum of its proper divisors (454481262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

343440018 is a wasteful number, since it uses less digits than its factorization.

343440018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14311 (or 14308 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 343440018 is about 18532.1347394195. The cubic root of 343440018 is about 700.2992040645.

The spelling of 343440018 in words is "three hundred forty-three million, four hundred forty thousand, eighteen".